Vogue Editor Anna Wintour offered a critique of David Letterman’s socks during her first appearance on CBS’ Late Show with David Letterman on Monday.

Dave, who considers himself a “fashion dope,” want Anna’s opinion on his gray printed socks, which she branded “interesting.”

The real-life inspiration behind The Devil Wears Prada is featured in the new documentary “The September Issue” about production of the 2007 issue was the best-selling in Vogue’s 117-year history.

“I’m very decisive and I try and give very clear direction to the people that I’m working with, and sometimes, unfortunately, they don’t hear the answer that they would like to hear,” Wintour said.